Diodes Incorporated 74AHC1GU04W5-7

Overview

74AHC1GU04W5-7 from Diodes Incorporated is an unbuffered single CMOS inverter gate in SOT25 package, operating from 2.0V to 5.5V supply, delivering ±6 mA output drive at 5.0V, with propagation delay as low as 2.6 ns (CL=15pF, VCC=5V), and designed for crystal oscillator biasing and analog inverter applications.

For engineers reviewing the 74AHC1GU04W5-7 datasheet, 74AHC1GU04W5-7 pinout, 74AHC1GU04W5-7 application, or 74AHC1GU04W5-7 equivalent, key selection criteria include unbuffered output topology, rail-to-rail input compatibility, ESD robustness (2 kV HBM), thermal resistance (195°C/W), and SOT25 footprint suitability for space-constrained timing circuits.

Technical Context

This device implements a single unbuffered inverting logic gate using advanced AHC CMOS process technology, enabling direct use in Pierce oscillator configurations where phase inversion and low input capacitance (2.0 pF typical) are critical for stable crystal startup and frequency accuracy.

Its totem-pole output stage supports bidirectional current flow (±6 mA at 5V), while the absence of internal buffering preserves signal integrity for analog feedback paths-distinct from buffered inverters used in digital logic isolation or level translation.

Key Specifications

Pinout & Package

SOT25 (5-pin small outline transistor) package with exposed pad not present; compact 2.8 mm × 1.6 mm footprint, 0.95 mm height, and JEDEC-compliant lead pitch (0.95 mm).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar unbuffered inverter applications.

Compared with SN74AHC1G04DBVR and 74LVC1G04GW,125, the 74AHC1GU04W5-7 uniquely balances ultra-low input capacitance, unbuffered topology, and industry-standard ESD robustness-making it the only choice among the three for precision crystal oscillator implementation.

Availability

74AHC1GU04W5-7 is available at Aetrix Electronics and suitable for crystal oscillator design, analog signal inversion, and low-power clock generation requiring stable component supply and consistent SOT25 packaging across production batches.

Supply support for 74AHC1GU04W5-7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability, energy-efficient components for industrial, computing, and consumer markets.

The 74AHC logic family targets low-power, high-speed digital and mixed-signal applications where rail-to-rail operation, wide supply tolerance, and robust ESD performance are essential - particularly in timing, interface, and sensor signal conditioning.

FAQ

Can the 74AHC1GU04W5-7 be used in a Pierce oscillator with a 32.768 kHz tuning fork crystal?

No - the 74AHC1GU04W5-7 is optimized for fundamental-mode AT-cut crystals (1–50 MHz) due to its propagation delay and drive strength. For 32.768 kHz crystals, the device's minimum operating frequency is too high, and its output drive may overload the low-Q tuning fork, causing instability or excessive current draw.

What is the maximum capacitive load the Y output can drive while maintaining specified tpd?

The 74AHC1GU04W5-7 maintains guaranteed propagation delay (tpd ≤5.5 ns) up to 50 pF load capacitance at VCC = 5V, per DS35178 Rev. 1–2 switching characteristics table. Beyond 50 pF, delay increases nonlinearly and output rise/fall times degrade, risking timing violations in synchronous systems.

Is Pin 1 (NC) electrically isolated or internally tied to substrate?

Pin 1 is a true no-connect terminal - physically unbonded and electrically isolated from all internal circuitry. Diodes Incorporated's AP02001 pad layout confirms no copper connection is required, and soldering or grounding this pin introduces parasitic coupling that may affect oscillator phase noise.

Does the unbuffered output affect DC output voltage levels under load?

Yes - unlike buffered inverters, the unbuffered totem-pole output exhibits slight VOH/VOL degradation under load: VOH drops to 3.94 V (min) at IOH = –6 mA (VCC = 4.5 V), and VOL rises to 0.44 V (max) at IOL = 6 mA. These shifts must be accounted for in oscillator bias point calculations.